Erhaia

Erhaia is a genus of small to minute^[3] freshwater snails with a gill and an operculum, aquatic gastropod mollusks in the family Amnicolidae.

Erhaia
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda clade Hypsogastropoda clade Littorinimorpha
Superfamily:	Rissooidea
Family:	Amnicolidae
Subfamily:	Amnicolinae[1]
Genus:	Erhaia Davis & Kuo in Davis, Kuo, Hoagland, Chen, Yang & Chen, 1985[2]
Diversity[3]
7 species (not up to date, see newer references)

Erhaia is the type genus of the tribe Erhaiini, which is now a synonym of the subfamily Amnicolinae.^[1]

Erhaia (also within the tribe Erhaiini) was originally described as a genus within the Pomatiopsidae in 1985,^[2] but Wilke et al. (2000, 2001) moved it to the Amnicolidae.^[4][5]

Distribution

The distribution of Erhaia includes southern China and India.^[6] The center of biodiversity of Erhaia in China is located in the provinces of Hunan, Hubei and Sichuan.^[3] Distribution also includes Fujian Province.^[3] There is also scattered occurrences of Erhaia in Yunnan Province.^[3] These snails live in the Yangtze River drainage and in the Mekong River drainage (1 species).^[6]

Description

The length of the shell of this species is up to 3.9 mm.^[6]

Species

Species within the genus Erhaia include:

• Erhaia daliensis Davis & Kuo, 1985^[2][6]
• Erhaia gongjianguoi (Kang, 1983)^[6]
• Erhaia hubiensis (Liu, Zhang & Wang, 1983)^[6]
• Erhaia jianouensis (Liu & Zhang, 1979)^[3][6]
• Erhaia kunmingensis Davis & Kuo, 1985^[2][6]
• Erhaia lii (Kang)^[6]
• Erhaia nainitalensis Davis & Rao, 1997^[6]
• Erhaia robusta (Kang, 1986)^[6]
• Erhaia sheminensis^[6]
• Erhaia wangchuki Gittenberger, Sherub & Stelbrink, 2017
• Erhaia wantanensis^[6]
• Erhaia wufengensis^[6]

Synonyms:

• Erhaia chinensis Davis et al. 1985 and Erhaia chinensis Davis & Kang, 1995^[3] are synonyms of Chencuia chinensis Liu & Zhang, 1979^[6]

Ecology

Erhaia lives in streams in mountainous areas.^[6]

References

1. Bouchet, Philippe; Rocroi, Jean-Pierre; Frýda, Jiri; Hausdorf, Bernard; Ponder, Winston; Valdés, Ángel & Warén, Anders (2005). "Classification and nomenclator of gastropod families". Malacologia. 47 (1–2). Hackenheim, Germany: ConchBooks: 1–397. ISBN 3-925919-72-4. ISSN 0076-2997.
2. Davis G. M., Kuo Y.-H. Hoagland K. E., Chen P.-L., Yang H.-M. & Chen D.-J. (1985). "Erhaia, a new genus and new species of Pomatiopsidae from China (Gastropoda: Rissoacea)". Proceedings of the Academy of Natural Sciences of Philadelphia 137: 48-78. page 66. JSTOR 4064860.
3. Davis G. M. & Kang Z. B. (1995). "Advances in the Systematics of Erhaia (Gastropoda: Pomatiopsidae) from the People's Republic of China". Proceedings of the Academy of Natural Sciences of Philadelphia 146: 391-427. JSTOR.
4. Wilke T., Davis G. M., Gong X. & Liu H.-X. (2000). "Erhaia (Gastropoda: Rissooidea): phylogenetic relationships and the question of Paragonimus coevolution in Asia". American Journal of Tropical Medicine and Hygiene 62(4): 453-459. abstract^{[permanent dead link]}, PDF^{[permanent dead link]}.
5. Wilke T., Davis G. M., Falniowski A., Giusti F., Bodon M. & Szarowska M. (2001). "Molecular systematics of Hydrobiidae (Mollusca: Gastropoda: Rissooidea): testing monophyly and phylogenetic relationships". Proceedings of the Academy of Natural Sciences of Philadelphia 151: 1-21Wilke, Thomas (2001). "Molecular systematics of Hydrobiidae (Mollusca: Gastropoda: Rissooidea): testing monophyly and phylogenetic relationships". Proceedings of the Academy of Natural Sciences of Philadelphia. 151 (1): 1–21. doi:10.1635/0097-3157(2001)151[0001:MSOHMG]2.0.CO;2. S2CID 86258304. JSTOR.
6. Davis G. M. & Rao S. (1997). "Discovery of Erhaia (Gastropoda: Pomatiopsidae) in northern India with description of a new genus of Erhaiini from China". Proceedings of the Academy of Natural Sciences of Philadelphia 48: 273-299. JSTOR.